3

UnCertain:
There are many possibilities. This could be a muscle, like fibromyalgia, it could be arthritis, or could be another syndrome. It would be best if you ask your physician to help clarify this and possibly send you to a rheumatologist.
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5

Doubt veins.:
Veins rarely cause pain unless they are inflamed(phlebitis) or have a clot in them. This does not seem to be your problem. I would look for another source of the problem such as carpal tunnel . You may want to follow up with a hand surgeon.
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6

No:
Heart burn will not cause right (or left) arm numbness. This is a nerve (as in neurology) symptom. If it goes away with change in position, then it's a trivial symptom you can ignore. If it persists when you move about, you will need testing done to see why your nerve or nerve root is acting up.
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8

Cervical nerve root:
More likely a pinched nerve in the neck. (Cervical radiculopathy). Viral infection can do this too (shingles) Do you have a skin rash? Did you injure your neck? There is an easy way to check for blood flow issues (does your radial pulse go away when you lift your arm up? If when you tilt your head toward your shoulder do you get pain or electrical like sensation on the same side ? (pinched nerve)
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9

Ice for the pain:
If the herpes infection is gone and this is just the residual pain and burning after shingles, then applying an ice pack tends to give some relief. Sarna lotion may also help, and topical Lidocaine can be soothing as well. There are also stronger prescription medications that can help too. If there is an active herpes infection, then that should be treated with anti-viral meds asap.
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10

Magic eraser:
Clean it thoroughly with soap and cool water and apply neosporin or polysporin (bacitracin and polymyxin). It is a burn and should be kept clean and covered. If it blisters or appears infected be seen. All the best and thank you.
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